If you open Device Manager (Right click the Windows logo in the left corner and select Device Manager), Expand the Network Adapters, find your WLAN NIC, right click on it and select Properties, go to the Driver tab, and there's a button there for Roll Back Driver.
Something like this;
ETA: Are these screen grabs ginormous for everyone? If so, I think it's due to my 4K display. I may have to downscale before posting.